Unbiennium (Ube)
Superactinide標準原子量
データなし電子配置
[Og] 5g⁹ 8s²融点
データなし沸点
データなし密度
データなし酸化数
データなし電気陰性度（Pauling）
データなし第1イオン化エネルギー
データなし発見年
データなし原子半径
データなしUnbiennium is the temporary systematic name for the hypothetical element with proton number 129. It has not been synthesized or observed in nature. Periodic-table extrapolations place it among the superheavy elements of the predicted eighth period, probably in the superactinide or g-block region. Its chemistry is expected to be strongly affected by relativistic and spin-orbit effects, so simple analogies with lighter elements are unreliable.
This element has not been synthesized or experimentally confirmed. All listed physicochemical properties are calculated, extrapolated, or model-dependent.
No atoms or macroscopic sample of unbiennium have been reported. Its appearance, density, melting point, crystal structure, and other bulk physical properties are unknown; published values, where given, are theoretical predictions only.
Unbiennium has no confirmed practical, commercial, medical, or industrial use. If it is ever produced, the first uses would be in nuclear-structure research, tests of superheavy-element synthesis, and decay-chain studies. Such work would involve individual atoms or very small numbers of atoms, not usable quantities of material. Any proposed applications based on unusual electronic structure remain speculative because no isotope or compound has been made.
No compounds of unbiennium are known. The element is expected to have very complex superheavy chemistry, with valence levels involving predicted 5g, 6f, 7d, and 8p orbitals rather than a simple main-group pattern. Oxidation states, ionic radii, bonding preferences, and ligand chemistry are therefore theoretical. Calculations may discuss possible halides, oxides, or molecular ions, but these are model species rather than experimentally characterized compounds.
No direct safety data exist for unbiennium. Any isotope made in a laboratory would almost certainly be radioactive and extremely scarce, so the principal hazard would be radiation from the atoms and their decay products rather than chemical toxicity of bulk material. Handling would be limited to shielded nuclear-research equipment designed for atom-at-a-time detection.
Unbiennium has no confirmed natural occurrence and no known environmental cycle. Because no isotope has been observed, its persistence, mobility, and chemical behavior in air, water, soil, or organisms are unknown. If produced experimentally, only isolated atoms would be generated, and they would decay or be retained within laboratory apparatus rather than enter the environment as a material flow.
Unbiennium has no commodity market, no practical supply chain, and no established demand outside possible basic research. Future production, if achieved, would require heavy-ion accelerator experiments using rare targets and intense beams, with expected yields far below macroscopic quantities. Costs would be dominated by accelerator operation, target preparation, detection systems, and repeated attempts at synthesis rather than by separable material value. Recycling or stockpiling is not meaningful for an element not yet made.
Unbiennium has not been detected in the universe. Standard models do not predict stable primordial quantities of such a high-proton element, and any isotopes formed in extreme nucleosynthetic events would be expected to be short-lived unless an unconfirmed island of enhanced stability includes suitable nuclei. Its extraterrestrial relevance is therefore theoretical.
- Ube is a temporary systematic symbol, not a permanent element name.
- The name unbiennium encodes the digits 1, 2, and 9 in IUPAC systematic nomenclature.
- Any confirmed isotope would probably be identified from a decay chain rather than by weighing a sample.
- Predicted chemistry may be less periodic than the name’s position suggests because nearby orbitals are closely spaced.
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性質
物理的性質
データなし
化学的性質
- 電子親和力
- 0.5 eV
- 電子配置
- [Og] 5g⁹ 8s²
熱力学的性質
データなし
原子核
- 陽子数
- 129 全元素の陽子数を比較 →
- 既知の同位体
- 0 全元素の既知の同位体を比較 →
- 安定同位体
- 0 全元素の安定同位体を比較 →
- 天然での存在
- 未観測
存在度
データなし
安全性
- 放射性
- はい
結晶構造
データなし
電子構造
- 各電子殻の電子数
- 2, 8, 18, 32, 41, 18, 8, 2 全元素の各電子殻の電子数を比較 →
識別子
- CAS登録番号
- 54576-80-6 全元素のCAS登録番号を比較 →
電子配置 予測値
——このイオンの電子配置データはありません。
原子モデル
同位体によって中性子数、質量、安定性は変わりますが、中性原子の電子配置は変わりません。
データなし
模式的な原子モデルです。実際の縮尺とは異なります。
原子の指紋
発光／吸収スペクトル
同位体分布
安定同位体はありません。
| 質量数 | 原子質量（u） | 天然存在比 | 半減期 |
|---|
相／状態
相・状態のデータはありません
データなし
相・状態のデータはありません